Cloth Pressing Device Of A Sewing Machine

ABSTRACT

A cloth pressing device of a sewing machine has a presser leg and a presser foot. The presser leg is a hollow cylinder and has a combining portion and a sleeve portion. The sleeve portion is integrated with a bottom portion of the combining portion. The presser foot is mounted around and fixed with a bottom portion of the presser leg. The presser foot has a surrounding portion and a pressing portion. The surrounding portion is a U-shaped block and has a front end and two free ends. The pressing portion is formed at the front end of the surrounding portion.

CROSS-REFERENCE TO RELATED APPLICATIONS

The present application claims priority from Taiwan Patent Application No. 106218127, filed Dec. 6, 2017, the disclosure of which is hereby incorporated by reference.

BACKGROUND OF THE INVENTION 1. Field of the Invention

The present invention relates to a device of a sewing machine, and more particularly to a cloth pressing device of a sewing machine.

2. Description of Related Art

With reference to FIG. 7, a conventional sewing machine 80 has a pressing leg 81 and a pressing rod 82. The pressing leg 81 is mounted around a bottom portion of the pressing rod 82. The purpose of the pressing leg 81 is to press a fabric smoothly on a plate of the sewing machine 80. A user may tailor a specific thread pattern according to a shape of the pressing leg 81 or with the aid of a tailor board.

The pressing leg 81 is mounted around the bottom portion of the pressing rod 82, and the pressing leg 81 is a one-piece structure. The user must unfasten and detach a screw from the pressing leg 81 in the process of replacing the pressing leg 81. However, the space under the pressing rod 82 is narrow. Therefore, the pressing rod 82 must be moved in the process of replacing the pressing leg 81, which is very inconvenient in operation.

SUMMARY OF THE INVENTION

The main objective of the present invention is to provide a cloth pressing device of a sewing machine.

The cloth pressing device of a sewing machine has a presser leg and a presser foot. The presser leg is a hollow cylinder and has a combining portion and a sleeve portion. The sleeve portion is integrated with a bottom portion of the combining portion. The presser foot is mounted around and fixed with a bottom portion of the presser leg. The presser foot has a surrounding portion and a pressing portion. The surrounding portion is a U-shaped block and has a front end and two free ends. The pressing portion is formed at the front end of the surrounding portion.

Other objects, advantages, and novel features of the invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a front view of a first embodiment of a cloth pressing device in accordance with the present invention mounted at a sewing machine;

FIG. 2 is a perspective view of the cloth pressing device in FIG. 1;

FIG. 3 is an exploded perspective view of the cloth pressing device in FIG. 1;

FIG. 4 is a perspective view of a presser foot of the cloth pressing device in FIG. 1;

FIG. 5 is a perspective view of a presser foot of a second embodiment of a cloth pressing device in accordance with the present invention;

FIG. 6 is a perspective view of a presser foot of a third embodiment of a cloth pressing device in accordance with the present invention; and

FIG. 7 is a front view of a pressing cloth device of a conventional sewing machine.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENT

With reference to FIGS. 1 to 4, a first embodiment of a cloth pressing device of a sewing machine in accordance with the present invention comprises a presser leg 10 and a presser foot 20.

The presser leg 10 is mounted around and fixed with a sewing machine 30. The sewing machine 30 has a pressing rod 31. The pressing rod 31 is a solid cylinder and has a mounting hole 311. The mounting hole 311 is transversely formed through the pressing rod 31 and is adjacent to a top surface of the pressing rod 31. Therefore, the presser leg 10 may be mounted around and fixed with the pressing rod 31 of the sewing machine 30.

The presser leg 10 is a hollow cylinder and has a combining portion 11 and a sleeve portion 12. The combining portion 11 has a combining hole 111 transversely formed through the combining portion 11. A screw is mounted through the combining hole 111 and the mounting hole 311 to make the presser leg 10 mounted around and fixed with the pressing rod 31 of the sewing machine 30. The sleeve portion 12 is integrated with a bottom portion of the combining portion 11. An outer diameter of the sleeve portion 12 is smaller than an outer diameter of the combining portion 11.

The presser foot 20 is mounted around and fixed with a bottom portion of the presser leg 10. The presser foot 20 has a surrounding portion 21 and a pressing portion 22. The surrounding portion 21 is a U-shaped block and has a front end 211, two free ends 212, a through hole 213, and a fastening hole 214. The through hole 213 is vertically formed through the surrounding portion 21 and between the front end 211 and the two free ends 212. The fastening hole 214 is transversely formed through the two free ends 212 of the surrounding portion 21. A screw 215 is mounted through the fastening hole 214 with a nut 216, and an inner diameter of the through hole 213 is adjustable.

The pressing portion 22 is formed at the front end 211 of the surrounding portion 21 and has a connecting section 221 and a model block 222. The connecting section 221 is formed at the front end 211 of the surrounding portion 21 and is an oblique block. The model block 222 is formed at a bottom portion of the connecting section 221. Preferably, the model block 222 is a circular ring and has a recess 2221. The recess 2221 is formed in a top surface of the model block 222.

When the first embodiment of the cloth pressing device in accordance with the present invention is in use, a user must loosen the screw 215 and the nut 216. Then, the user may replace the presser foot 20 rapidly and conveniently. For replacement of the pressing leg 81 of the conventional sewing machine, which has a narrow space under the pressing rod 82, the pressing rod 82 must be moved before the replacement, while the present invention is rapid in replacement of the presser foot 20 and hence is convenient in operation.

With reference to FIG. 5, a second embodiment of a cloth pressing device in accordance with the present invention is substantially the same as the first embodiment except for the following features. The model block 222A is a circular ring and has a positioning hole 2221A. The positioning hole 2221A is vertically formed through the model block 222A and is away from the connecting section 221A.

With reference to FIG. 6, a third embodiment of a cloth pressing device in accordance with the present invention is substantially the same as the first embodiment except for the following features. The model block 222B is a semicircular sphere and has a receiving hole 2221B. The receiving hole 2221B is vertically formed through a top surface of the model block 222B.

Even though numerous characteristics and advantages of the present invention have been set forth in the foregoing description, together with details of the structure and function of the invention, the disclosure is illustrative only, and changes may be made in detail, especially in matters of shape, size, and arrangement of parts within the principles of the invention to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed. 

What is claimed is:
 1. A cloth pressing device of a sewing machine comprising: a presser leg being a hollow cylinder; and a presser foot detachably mounted at a bottom portion of the presser leg.
 2. The cloth pressing device as claimed in claim 1, wherein the presser leg has a combining portion having a combining hole transversely formed through the combining portion; and a sleeve portion integrated with a bottom portion of the combining portion.
 3. The cloth pressing device as claimed in claim 2, wherein the presser foot has a surrounding portion being a U-shaped block and having a front end; two free ends; a through hole vertically formed through the surrounding portion and between the front end and the two free ends; and a fastening hole transversely formed through the two free ends; and a pressing portion formed at the front end of the surrounding portion.
 4. The cloth pressing device as claimed in claim 3, wherein the pressing portion has a connecting section formed at the front end of the surrounding portion and being an oblique block; and a model block formed at a bottom portion of the connecting section.
 5. The cloth pressing device as claimed in claim 4, wherein the model block is a circular ring and has a recess formed in a top surface of the model block.
 6. The cloth pressing device as claimed in claim 4, wherein the model block is a circular ring and has a positioning hole vertically formed through the model block and away from the connecting section.
 7. The cloth pressing device as claimed in claim 4, wherein the model block is a semicircular sphere and has a receiving hole vertically formed through a top surface of the model block. 